Try a reducing agent. See if a washing machine with hot water and then iron it will make it smaller. That works with my cloths. Go back to where you purchsed that one and get the rest of the set in that same size.
Thats a cool set Ziggy. The one I got was a novelty at a old train station in Tennessee. but hey I got a 1877!!!:goofer:
I haven't the foggiest idea! I believe this set has passed through about a half dozen different hands as Christmas grab gifts. Richard